CVE-2026-70455

Publié : 13 août 2026

Modifié : 13 août 2026

Score CVSS

7.5

HIGH

Description détaillée

rsync 3.4.2 before 3.5.0 contains a denial of service vulnerability that allows a remote sender to exhaust system resources by specifying the --zt short alias for --compress-threads, which bypasses the refuse options directive's string matching on long option names. Attackers can specify --zt=N with a large value to spawn an unbounded number of Zstandard worker threads on the receiver, exhausting available thread and memory resources.

Vecteur d'attaque (CVSS)

Vecteur brut :CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Références et Patchs

https://github.com/RsyncProject/rsync/releases/tag/v3.5.0 https://github.com/RsyncProject/rsync/security/advisories/GHSA-rjvj-qgqg-cvx9 https://www.vulncheck.com/advisories/rsync-dos-via-zt-zstandard-compression-thread-exhaustion

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